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Sure its all a matter of definition. But afaik tournament selection is 
one of the most popular
steady state selection, because not all individuals are evaluated. there 
is no replacement
of a whole generation (if you assume, the not evaluated individuals do 
not use reproduction).


Sean Luke wrote:
> Generations are independent of the selection procedure.  In 
> generational selection, individuals are evaluated, and then through a 
> process of selection and breeding, a new population is formed.  Once 
> the new population is in place, it replaces the old one and the cycle 
> repeats.  That's one generation.
>
> The only exception to this is in steady state evolution, where ECJ 
> used to abuse the "generation" marker to mean something else -- but 
> we've since changed that and there is a formal definition in steady 
> state evolution as to what everything is.
>
> Sean
>
> On Oct 30, 2006, at 8:41 AM, Serethos wrote:
>
>> I am wondering how a Generation is defined in ECJ if Tournament 
>> Selection
>> is used. Is there a generation change, after _one_ tournament has 
>> been executed
>> or after enough individuals have been produced so that
>> numWinners == numIndividualsOfPopulation?
>